Walk Down the Aisle/First Dance Song

Hi Bees! Maybe a silly question, but I’m just wondering: my FI and I have already picked out our first dance song, but I’m a bit stuck on the walking down the aisle song. Would it be totally weird if I jut had the piano version of our first dance song play? It isn’t a popular song (it’s actually not even a song that has ever been on the radio – it’s a song on the delux edition of the artists album), so I don’t think anyone would recognize it for the walking down the aisle song and then 3.5 hours later say “Oh hey, we heard that once today but with no words” lol. Or is that just totally weird and semi-lazy to have it as both songs? I really, really LOVE the song, for what it’s worth.